Steam-boiler



4 Sheets-She'et 1'.

(No Model.)

N. 'PURLONG.

STEAM BOILER No. 393,064. Patented Nov. 20, 188 8.

(No Model.) .4 Sheet s--Sheet 2. N. FUR'LONG.

STEAM BOILER.

Patented Nov. 20, 1888.

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4 Sheets-Sheet}.

N. PURLONG.

STEAM BOILER.

(No Model.)

No. 898,084. Patented Nov. 20, 1888.

8 (No Model.) '4 Sheets-Sheet 4.

'N. FURLONG.

STEAM BOILER. No. 393,064. Patented Nov. '20, 1888.

MWMWNWMW H III IEIIII mm I N. PETERS. Pholuwmgnplmf. withing! ILC cient to enable others skilled in the art to NITED' STAT S- NICHOLAS FURLONG, OF BROOKLYN, NEW YORK.

STEAIVFBOILER.

SPECIFICATION forming part of Letters Patent No. 393,064, dated November 20, 1888.-

Application filed March 27, 1888. Serial No. 268,632. (No model.)

To all whom it may concern:

Be it known that I, NICHOLAS FURLONG, a citizen of the United States, residing in the city of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Steam-Boilers, of which the following is a specification suffiwhich the invention appertains to make and use the same.

My improvements relate to that class of steam-generators in which a series of opposed side pipes inclosing the combustion-chamber are connected by a series of transverse pipes passing through the upper part of said combustion-chamber, the design being to augment the heat absorbing surface within a given space.

My invention consists, primarily, in the special construction and arrangement of the upper and lower manifold pipes, side pipes, and transverse connecting-pipes, whereby I attain not only a constant uniform circulation of the liquid throughout the whole boiler, thereby avoiding undue heating or expansion of particular parts, but also greatly reduce the danger of the formation of scale or incrustation, since all matter held in suspension in the water will naturally be deposited in or re turned to the lower manifolds situated below the fire-grate, from which it can be readily blown off or otherwise removed from time to time, as required.

Asecondary feature of my invention consists in the peculiar construction of the joints between the upright pipes and the manifolds, whereby the-assembling of the parts is facili= tated.

In the accompanying drawings I represent means for giving practical effect to my improvements, although I do not wish to confine myself strictly to the identical form and construetion of parts shown, since it is obvious that various modifications may be introduced therein without deviating materially from the essential features of my invention.

Figure 1 is a side elevation of my improved form of steam-generator,the side casing being removed to show the system of side pipes. Fig. 2 is a plan of the boiler; Fig. 3, a front elevation of the same; Fig. 4, a horizontal section of one side of the boiler below the firegrate upon plane of line 2) t, Fig. 1, showingv aplan ofone of the lower manifolds. Fig. 5is a horizontal section upon plane of line to 20, Fig. 1, above the grate-bars. Fig. 6 is a central vertical transverse section of the boiler upon plane of line 00 at, Fig. 1; Fig. 7, a horizontal section upon plane of line yy, Fig. 1, immediately below the upper manifold pipes or heads. Fig. 8 is an elevation showing one of the side pipes with which the transverse heating-pipes are connected arranged for aseries of comparatively small pipes alternating with each other in position. Fig. 9 is a similar view arranged for a less number of transverse pipes of a larger size. Fig. 10 is a detail view showing a method of attaching the ends of the transverse pipes to the side pipes by means of a bushing; Fig. 11, a detail view showing-one of the transverse pipes as made into sections (to be attached independently to opposite side pipes) and united by ascrew-coupling. Fig. 12 is a vertical section of the generator upon plane of line a a, Fig. 2. Fig. 13 is a sectional view of a modified or duplex form of steamboiler made according to my improvements.

The walls of the combustion-chamber Aare constituted by a series of stand-pipes or mani folds substantially vertical in position. Of these, B B represent the front wall, B B the rear wall, and B B B 13 the opposite side walls, respectively. The wall-pipes B B B B are'connected with and supported below updn manifolds O O O 0, arranged in approximately horizontal positions, and above by manifolds D D D D which are substantially parallel to those below. The front manifold, O, is connected with the lower side manifolds, O 0 by the upright pipes c c. \Vhere the firechamber is designed to be made accessible through two doors, as would be the casein the arrangement shown in the drawings, the intermediate space between the doors may be occupied by stand-pipes c 0" opening into the front manifold, O, the ash-pit and furnace doors being arranged to close the spaces Q X in any ordinary or convenient manner.

The grate a is supported at a suitable height within the walls 13 B l3 13 by any well-known or appropriate means.

, In the combustion-chamber A, situated immediately above the grate a, and separated therefrom only'by a space sufficient for the accommodation of the fuel, a series of transverse pipes, E E, are arranged, communicating at opposite ends with the opposed upright manifolds B B. It will be seen that these transverse heating-pipes E are-interposed betweenagainst the pipes successively as said gasesrise-vertically on their way to the-smoke-staek -F. A convenient construction calculated to insure this result, especially in small-sized boilers, is the arrangement shown in Figs. 6,

7, 8, and 12, in which each upright. manifold.

is connected with two series of pipes, E, of

small diameter, each series projecting from the manifolds in a different vertical plane in such manner that the pipes overlap each other slightly, and thereby cause the products of combustion to deviate more or less in their passage upward, so as to bring them into intimate contact with all the super-posed pipes in succession.

Where preferred, as in the case of thelarger sizes of boilers, a single series of superposed transverse pipes, E,may be employed between each of the opposed upright manifolds B B, as illustrated in Figs. 9 and 13. In this case substantially the same result is attained by using transverse pipes nearly as large as'the manifolds in cross-secti0n,and in arrangingthe adjoining vertical series entering the adjoining manifolds so as to alternate or break joint with-them, as will be understood by reference to Fig. 9, in which adjoining upright manifolds are shown with the holes forthe reception of the ends of the transverse pipes E.

. Various means may obviously be resorted to for the purpose of connecting the transverse pipes E with the opposed manifolds B 3, and I do not wish to confine myself to either of the methods herein shown. For instance, if preferred, the ends of the transverse pipes E may be secured by expanding them within the holes formed for theirreception in the manifolds 13* B, in which case it would be necessary to provide means of access from the rear of the manifolds, to be afterward plugged up. As shown in the drawings, the manifolds B B are supposed to betapped for the reception of screw-threads formed upon the ends of the transverse pipes E. Vhere the transverse pipes E are each formed of a single piece, a bushing, e, is used at one extremity (as shown in Fig. 10) to secure that end of the pipe after its other end has been screwed directly into the opposite manifold; or, in lieu of either construction above named, each transverse pipe E may be formed of two sections independently screwed into the opposite upright manifolds BB, and afterwardjoined together by a coup- 7o ling, e, formed with right and left hand female serew-threads,which engage with correspondingly-formed male screw-threads upon the in ner ends of the two sections, as shown in Fig. 11.

If desirable, each upright manifold B B" may communicate directly with both the upper and lower manifolds, O O O G and D D D D,

termediate pipes, B B, beingshorter and independent of the nppermanifolds.

In carrying out this construction I arrange the shorter independent uprights, B 11, on either side of the combustion-chamber diametrically opposite to the longer pipes, 13' B,which communicate with the upper manifolds, D D, upon the opposite side of the combustion-chamber, and connect such opposed pipes by means of the transverse heating-pipes E, so that the latter transfer the liquid from the shorter upright sealed pipes, D D", upon one side to the longer upright pipes, 13 13", on the opposite side of the chamber. The result is that as the liquid'in the shorter pipes, 13' Bfi-and in the connecting transverse pipes E becomes heated it passes over and ascends through the longer pipes, B 13, into the upper horizontal manifolds, D D". To facilitate this action, as well as to prevent incrustation or deposit as far as pos sible, the transverse pipes E are preferably inclined upward from the shorter upright pipes, 13* B, toward the longer upright pipes, 13' 13, as indicated in the drawings.

The upper manifolds, D and D, each communicate with the steanrdrum G- by any suitable form of connection, as by means of the exterior pipes, (1 cl, or directly through openings d d, as shown in Fig. 13, so that the live steam accumulates in the drum G,from which it is drawn olfin the ordinary manner. The upper manifolds,l) D,also communicate with the lower manifoldsfi C by the pipes c c, by which means a circulation is maintained throughout the entire system, since the front and rear horizontal manifolds,l) and D, above and O and 0 below communicate,respectively, with the horizontal side manifolds, D and D and O and'O.

In order to facilitate the attachment of the upright pipes 'B B 13 I prefer to connect them with the lower manifolds, O C O, by means of Y-joints J J, the lower ends of which screw into the said lower manifolds, while their upper bifurcated ends receive the lower ends of short coupling-pipes K K, the opposite ends of which are formed, respectively, with right and left hand screw-threads K K, and also screw into the lower ends of the upright pipes B, as shown in the drawings.

The inlet or feed-water pipes L L preferably communicate with the front ends of the lower side manifolds, G 0 as shown,although the feed-water may be introduced at any appropriate point in the system, as may be deemed most desirable.

The whole system of pipes, manifolds, and connections is inclosed in a suitable covering, preferably of asbestus or other non-conducting materiaLM, ineased in sheet-iron, N, or brickwork,according to the requirements of special use. For marine boilers the asbestus and sheetiron casing is desirable, as affording the neecssary insulation and strength with lightness and economy of space.

\Vha-t I claim as my invention, and desire to secure by Letters Patent, is-- 1. In a steam-boiler, a series of upright water-heating pipes arranged upon opposite sides of the combustion-chamber, the alternate or shorter members of which connect only with lower manifold pipes and the remaining or longer members of which connect both with lower and upper manifold pipes, in combination with a series of transverse heating-tubes passing through the combustion-chamber and connecting the shorter pipes of one series with the longer pipes of the opposite series, substantially in the manner and for the purpose described.

2. In a steam-boiler, the combination, with a series of upright water-heating pipes arranged in pairs and connected with a steamchamber above and with a lower manifold pipe connected with an inlet snpply-pipe,of a series of Y-pipes connected with the saidlower manifold, and a series of connecting-pipes, the respective ends of which are formed with right and left hand screw-threads for engagement with the lower ends of the said upright pipes and the upper ends of the said Y-pipes, substantially in the manner and for the purpose described.

NICHOLAS FURLONG. Vitnesses:

D. W. GARDNER, G. T. Mm'r'r. 

